Oersted's Apparatus demonstrates the magnetic field created by a current.

• Machine Shows Action of Electric Current on a Magnet
• Cobalt-Steel Needle
• Agate Bearing
• Plastic Base
• Rectangular Frame Fitted with Terminals

In other words, it shows the action of electric current on a magnet.

A cobalt-steel needle (75 mm long) with agate bearing supported by a pivot is mounted on a plastic base and surrounded by a rectangular frame fitted with terminals. A power supply is required but not included.